| Geyser | 1973-03-21 |
|---|---|
| Guardian | 1545 |
| Ledge | 2030 A |
| Values for Old Faithful Area | 1973-03-21 |
|---|---|
| Astronomical Twilight Begin | 04:46 |
| Nautical Twilight Begin | 05:21 |
| Civil Twilight Begin | 05:55 |
| Sunrise | 06:24 |
| Sunset | 18:36 |
| Civil Twilight End | 19:05 |
| Nautical Twilight End | 19:39 |
| Astronomical Twilight End | 20:14 |
| Moon Illumination | 94.42% |